#include<stdio.h>
#include<unistd.h>

int main( void )
{
  printf("hello Linux!\n");
  printf("hello Linux!\n");
  //pid_t pid;
  //printf("Before: pid is %d\n", getpid());
  //if ( (pid=fork()) == -1 )perror("fork()"),exit(1);
  //printf("After:pid is %d, fork return %d\n", getpid(), pid);
  //sleep(1);
  return 0;
}
